diff --git a/compatibility/2.nom b/compatibility/2.nom
index 9903ddd..35ed1a0 100644
--- a/compatibility/2.nom
+++ b/compatibility/2.nom
@@ -5,16 +5,16 @@ use "compatibility/compatibility.nom"
 upgrade %tree to "2" as:
     unless (%tree is "Action" syntax tree): return
     if (all[%tree.stub is "if % % else %", not (%tree.3 is "Var" syntax tree), not (%tree.5 is "Var" syntax tree)]):
-        %true_body = (%tree.3 upgraded from "1.2")
+        %true_body = (%tree.3 upgraded)
         unless (%true_body is "Block" syntax tree):
             %true_body = (=lua "Block(\%true_body.source, \%true_body)")
-        %false_body = (%tree.5 upgraded from "1.2")
+        %false_body = (%tree.5 upgraded)
         unless (%false_body is "Block" syntax tree):
             %false_body = (=lua "Block(\%false_body.source, \%false_body)")
         return (..)
             \(if %cond %true_body else %false_body)
             ..with vars {..}
-                cond:%tree.2 upgraded from "1.2", true_body:%true_body, false_body:%false_body
+                cond:%tree.2 upgraded, true_body:%true_body, false_body:%false_body
     
     %need_blocks = [..]
         "if % %", "unless % %", "for % in % %", "for % = % in % %", "repeat while % %"
@@ -23,7 +23,7 @@ upgrade %tree to "2" as:
         "for % in recursive % %", "test %", "with % %", "result of %"
     for %n in %need_blocks:
         if ((%tree.stub is %n) and (not ((last in %tree) is "Var" syntax tree))):
-            %bits = (((% upgraded from "1.2") if (% is syntax tree) else %) for % in %tree)
+            %bits = (((% upgraded) if (% is syntax tree) else %) for % in %tree)
             unless ((last in %bits) is "Block" syntax tree):
                 %body = (last in %bits)
                 %bits.(length of %bits) = (=lua "Block(\%body.source, \%body)")